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Multiple response type filtration-controllable electrospun nanofiber membrane and preparation method thereof

A nanofiber membrane, responsive technology, applied in textiles, papermaking, non-woven fabrics, etc., can solve the problems of no intelligent separation characteristics, complex operation process, non-reusability, etc., to achieve simple and easy experimental operation, filtration reaction Rapid, low production cost results

Active Publication Date: 2017-01-11
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems that traditional filtration membranes do not have intelligent separation characteristics, high separation efficiency, high cost, non-reusable, and complicated operation procedures, the present invention uses electrospinning technology to combine temperature-sensitive / pH-sensitive polymers Introduced into the spinning solution to form a multifunctional, high value-added functional filter material, through multiple filtrations of membranes with different pore sizes, the separation of substances with different particle sizes can be achieved

Method used

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  • Multiple response type filtration-controllable electrospun nanofiber membrane and preparation method thereof
  • Multiple response type filtration-controllable electrospun nanofiber membrane and preparation method thereof

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Experimental program
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Embodiment 1

[0032] 1) Preparation of electrospinning polymer solution: Weigh 0.5 g of electrospinning polymer monomer N-isopropylacrylamide and acrylic acid with a precision balance, add ethanol under nitrogen and ice water bath -1 °C protection Green solvent with a water volume ratio of 5:7, magnetically stirred for 10 minutes until uniformly mixed, added 0.1 g APS and 10 μL TEMED in sequence, controlled the reaction temperature at 40 ° C, and the reaction time was 10 h to synthesize a spinning solution with a polymer concentration of 10 wt%. ;

[0033] 2) Spinning of nanofiber membrane: First, put the mixed solution obtained in step 1 under magnetic stirring for 15 minutes to make the mixed solution uniform and obtain a uniform electrospinning spinning solution, then put it into a 15mL plastic syringe, and use the purchased electrostatic Spinning device, adjust spinning parameters such as spinning voltage 15kV, receiving distance 15cm, liquid feeding rate 0.5mL / h, etc., to avoid a large...

Embodiment 2

[0036] 1) Preparation of electrospinning polymer solution: Weigh 1.2 g of electrospinning polymer monomer N-vinyl caprolactam and methacrylic acid with a precision balance, and add A green solvent with a volume ratio of ethanol / water of 4:1, stirred magnetically for 20 minutes until uniformly mixed, added 0.15 g APS and 15 μL TEMED in sequence, controlled the reaction temperature at 30 ° C, and the reaction time was 11 h, and the spinning polymer concentration was 12 wt%. liquid;

[0037] 2) Spinning of nanofiber membrane: First, place the mixed solution obtained in step 1 under magnetic stirring for 15 minutes to make the mixed solution uniform and obtain a uniform electrospinning spinning solution, then put it into a 10mL metal syringe, and use a self-made electrostatic spinning solution. Spinning device, adjust spinning parameters such as spinning voltage 10kV, receiving distance 10cm, liquid feeding rate 0.3mL / h, etc., to avoid a large amount of spinning liquid overflowing...

Embodiment 3

[0040] 1) Preparation of electrospinning polymer solution: 1.5 g of electrospinning monomer N, N'-diethylacrylamide and N, N-dimethylaminoethyl ester were weighed by a precision balance, Under the protection of nitrogen and ice-water bath at 0°C, add a green solvent with a volume ratio of ethanol / water of 4:7, stir magnetically for 25 minutes until uniformly mixed, then add 0.15g APS and 20μL TEMED in sequence, control the reaction temperature to 40°C, and the reaction time to 12h. Synthetic polymer concentration is the spinning solution of 15wt%;

[0041] 2) Spinning of nanofiber membrane: First, place the mixed solution obtained in step 1 under magnetic stirring for 30 minutes to make the mixed solution uniform and obtain a uniform electrospinning spinning solution, then put it into a 15mL plastic syringe, and use the purchased electrostatic Spinning device, adjust the spinning parameters such as spinning voltage 15kV, receiving distance 10cm, liquid feeding rate 0.7mL / h, et...

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Abstract

The invention relates to a multiple response type filtration-controllable electrospun nanofiber membrane and a preparation method thereof. Nanofibers are composed of electrostatic spinning thermosensitive and pH responsive polymers and solvents, and the multiple response type filtration-controllable electrospun nanofiber membrane is formed by putting a prepared mixed solution in an injector and then spinning of an electrostatic spinning apparatus. The multiple response type filtration-controllable electrospun nanofiber membrane and the preparation method thereof have the advantages that since smart response of the thermosensitive and pH responsive polymers in the spinning solution is combined with the advantages of large specific area, high porosity and loose and porous performance of the nanofibers, controllable filtration of air is achieved; the preparation method is simple and easy to implement, low in production cost, high in interception efficiency, low in resistance, rapid in filtration reaction, high in treatment efficiency, reusable and capable of achieving smart separability of the nanofiber membrane and can be applied to the fields such as filtration and adsorption, drug delivery, chemical separation, sensing drive and tissue engineering.

Description

technical field [0001] The invention relates to the fields of electrospinning technology, intelligent polymer materials, air filtration and the like, in particular to a multi-responsive controllable filtration electrospun nanofiber membrane and a preparation method thereof. Background technique [0002] With the development of industry, my country's air pollution is becoming more and more serious. The smog weather that has appeared in major cities this year has made people pay more and more attention to air quality. When fine particles with a particle size of less than 2.5 μm in the air are inhaled into the human body, they will cause serious harm to the human respiratory tract, cardiovascular system, etc. In order to achieve a high level of air cleanliness and remove small particles in the air, the most effective method is air filtration. The filter material is the core of the filter, and the selected filter material requires excellent filter performance. The high-efficie...

Claims

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Application Information

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IPC IPC(8): D04H1/4326D04H1/728C08F220/54C08F220/06C08F226/06C08F222/02C08F220/58C08F220/34
CPCC08F220/06C08F220/34C08F220/54C08F220/58C08F222/02C08F226/06D04H1/4326D04H1/728D10B2505/04
Inventor 张青松邓伶利陈冰洁穆齐峰储智勇沈红豆杨超超刘鹏飞陈莉
Owner TIANJIN POLYTECHNIC UNIV
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